[3] The coming of the Iowa & St. Louis Railway in 1902 and building of a depot lead to a boom in business and population growth for the sleepy little river hamlet.
[4] With the exception of larger towns like Kirksville and Novinger, the rest of Adair County, and indeed much of northeast Missouri, would have to wait many years more for rural electrification.
Excellent fishing led to a series of small cottages and weekend retreats being built on the west bank of the Chariton River across from Yarrow shortly after World War II.
While the Iowa & St. Louis Railroad long ago ceased operations through Yarrow, the former I & St.L depot still remains and has been converted into a private residence.
Something of a business boomlet has occurred in recent years as well, with a popular local bar and restaurant, and a campground now operating on the edge of the village.